A spot in the NFC championship game will be on the line when the Green Bay Packers and Seattle Seahawks collide in a NFC divisional round playoff game on Sunday at Lambeau Field in Green Bay, Wisc. Kickoff is set for 6:40 p.m. ET. Green Bay is a 4.5-point favorite, while the Over-Under for total points scored is 45.5.

Before you make any Packers vs. Seahawks picks, you NEED to hear what our resident Packers expert, R.J. White, has to say.

White has been SportsLine's top pro football analyst for three years. Since Jan. 1, 2017, the CBS Sports NFL editor and nationally recognized NFL Draft expert has returned $2,193 to $100 bettors with his against-the-spread picks.

The stats guru, whose picks are coveted by fans everywhere, has hit it big in the world's most prestigious handicapping tournament -- the Westgate Las Vegas SuperContest -- twice in the past five years. In addition, he has had a particularly keen eye for the Packers. He is an amazing 34-6 on his last 40 against-the-spread picks involving Green Bay, including the last five! Anyone who has followed him is WAY up.

We can tell you White is leaning Under on Sunday, but his much stronger play is on the spread. White has found a crucial x-factor that has him going BIG on one side. You ABSOLUTELY need to see it before locking in your own picks.

Who wins Packers vs. Seahawks? And what crucial x-factor makes one side a must-back? ... Join SportsLine right now to see which side of the Packers vs. Seahawks spread you need to back on Sunday, all from the acclaimed expert who's 34-6 on his last 40 against-the-spread picks involving Green Bay!